I accidentally noticed you picked me as the best answer, and I'm honored and humbled. :3
Unless you're running a server, you don't really need 6 cores. Now, it's better to have a faster quad core CPU because applications still don't have the optimum multi-core scalability. Even with the latest games, fast quad > med hex.
BTW, look here. http://img199.imageshack.us/img199/1096/intel2march2010xeonline.jpg
The W3530 seems to me like a preview of the i7 930. (W3520
, etc.) It's 2.8GHz, has 130W TDP, and has 8MB L3 cache, like the 920.
The only real difference between the 920 and the 930 is that the 920's multiplier is 20, and the 30's is 21. So you might be able to squeeze a little higher overclock out of the 930...
Well, I'm waiting for a 6gb/s SSD, so I might as well wait for the 930..